Oleic acid/oleylamine ligand pair: a versatile combination in the synthesis of colloidal nanoparticles

作者：Stefanos Mourdikoudis, Melita Menelaou, Nadesh Fiuza‐Maneiro, Guangchao Zheng, Shuangying Wei, Jorge Pérez‐Juste, Lakshminarayana Polavarapu, Zdeněk Sofer · 发表于：Nanoscale Horizons · 年份：2022 · DOI：10.1039/d2nh00111j · 被引用次数：251 · 研究领域：Advanced Photocatalysis Techniques、Perovskite Materials and Applications、Quantum Dots Synthesis And Properties

A variety of colloidal chemical approaches has been developed in the last few decades for the controlled synthesis of nanostructured materials in either water or organic solvents. Besides the precursors, the solvents, reducing agents, and the choice of surfactants are crucial for tuning the composition, morphology and other properties of the resulting nanoparticles. The ligands employed include thiols, amines, carboxylic acids, phosphines and phosphine oxides. Generally, adding a single ligand to the reaction mixture is not always adequate to yield the desired features. In this review, we discuss in detail the role of the oleic acid/oleylamine ligand pair in the chemical synthesis of nanoparticles. The combined use of these ligands belonging to two different categories of molecules aims to control the size and shape of nanoparticles and prevent their aggregation, not only during their synthesis but also after their dispersion in a carrier solvent. We show how the different binding strengths of these two molecules and their distinct binding modes on specific facets affect the reaction kinetics toward the production of nanostructures with tailored characteristics. Additional functions, such as the reducing function, are also noted, especially for oleylamine. Sometimes, the carboxylic acid will react with the alkylamine to form an acid-base complex, which may serve as a binary capping agent and reductant; however, its reducing capacity may range from lower to much lower than tha...